amplitude, measurement of the amount of energy in a wave; distance between the peak or trough and the resting position, transverse wave, a wave that moves perpendicular to the direction of the wave; up and down, longitudinal wave, a type of wave in which the particles move back and forth in the same direction that the wave travels; parallel to the direction of the wave,, electromagnetic wave, are created as a result of vibrations between an electric and a magnetic field, mechanical wave, require a medium in order to transport their energy from one location to another., wave, a disturbance that transfers energy without a net movement of particles., frequency, the number of waves that pass a fixed point in unit time, hertz, a unit of frequency equal to one cycle per second, medium, a material through which a wave travels, wavelength, the distance from one point in the wave to an identical point in the next wave; crest to crest or trough to trough, wave period, time needed for one cycle, wave speed, speed at which a wave travels, trough, the lowest part of a transverse wave, crest, the highest part of a transverse wave.

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